Description Usage Arguments Value
View source: R/cws_rou_overturning.R
Calculates the critical wind speed for overturning using the roughness method.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | uh_overturning_rou(
mean_ht,
mean_dbh,
spacing,
dist_edge,
gap_size,
mean_cr_width,
mean_cr_depth,
moe,
c_reg,
n_drag,
c_drag,
drag_upper_limit,
stem_vol,
stem_density,
crown_density,
snow_depth,
snow_density,
ro,
fgr_constants
)
|
mean_ht |
Arithmetic mean height of the trees in the stand (m). |
mean_dbh |
Mean dbh of all trees in the stand (cm). Dbh is diameter at breast height, measured at 1.3m above the ground. Essential. |
spacing |
Mean distance between trees (m). |
dist_edge |
Distance from the upwind edge (m). |
gap_size |
Length of the upwind gap (m). |
mean_cr_width |
Width of the crown of the mean tree in the stand (m). |
mean_cr_depth |
Depth of the crown of the mean tree in the stand (m). |
moe |
Modulus of Elasticity of green wood (MPa). |
c_reg |
Regression coefficients of uprooting moment against stem weight (N m kg-1). |
n_drag |
N parameter of the drag coefficient formula (dimensionless). |
c_drag |
C parameter of the drag coefficient formula (dimensionless). |
drag_upper_limit |
Maximum wind speed used during the experiments from which |
stem_vol |
Stem volume of the mean tree in the stand (m^3). |
stem_density |
Density of green wood of the stem (kg m-3). |
crown_density |
Crown density of the mean tree in the stand (kg m-3). |
snow_depth |
Depth of layer of snow on tree crown (cm). |
snow_density |
Density of snow (kg m-3). |
ro |
Air density (kg m-3). |
A list including: The critical wind speed (m s-1) for overturning at zero plane displacement height for the roughness method; The applied bending moment; The zero plane displacement height; The ratio of critical wind speed at canopy top over friction velocity (uh / u*); The deflection loading factor; The critical overturning moment; The combined effect of edge, gap, and gust on the applied bending moment.
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